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The equiatomic plumbides  RE RhPb ( RE =Y, La–Nd, Sm, Gd–Lu) were synthesized by induction melting of the elements in sealed niobium ampoules. The samples were characterized by X-ray powder diffraction, confirming their ZrNiAl-type structure, space group  P 6̅2 m . Four structures were refined from single-crystal X-ray diffractometer data:  a =769.42(5),  c =415.60(3) pm,  wR =0.0415, 343  F  2  values, 15 variables for LaRhPb,  a =767.91(6),  c =369.37(4) pm,  wR =0.0798, 284  F  2  values, 15 variables for ErRhPb,  a =767.01(8),  c =366.21(4) pm,  wR =0.0380, 341  F  2  values, 15 variables for YbRhPb and  a =766.9(1),  c =363.42(6) pm,  wR =0.0699, 290  F  2  values, 15 variables for LuRhPb. The  RE RhPb plumbides contain two crystallographically independent rhodium atoms, both in tricapped trigonal prismatic coordination: Rh1@Pb 3  RE  6  and Rh2@ RE  6 Pb 3 . Short Rh–Pb distances (277 and 284 pm in ErRhPb) are indicative of covalent Rh–Pb bonding. The crystal chemical details of the  RE RhPb series are compared with the silver plumbides  RE AgPb which show different transition metal-lead coloring. Temperature dependent magnetic susceptibility data show Pauli paramagnetism for YRhPb, LaRhPb and LuRhPb. An antiferromagnetic ground state below the Néel temperatures of 13.5, 21.0 and 6.9 K was found for PrRhPb, TbRhPb and DyRhPb, respectively. HoRhPb exhibits Curie-Weiss behavior in the observed temperature range.

Equiatomic rare earth rhodium plumbides RE RhPb ( RE =Y, La–Nd, Sm, Gd–Lu) with ZrNiAl-type structure